Conical lens, also known as cone lens, light cone or axisymmetric prism, is a special optical element consisting of a conical surface and a flat surface. Conical lenses can generate beams of specific shapes, such as annular beams, to meet specific application requirements.

Conical lens can generate beams with Bessel intensity distribution or conical non-divergent beams. Bessel beams are non-diffracting concentric annular beams with unique optical properties.

Conical lenses are usually made of high-quality UV fused quartz, precision polished, with a base angle range from 0.5° to 40°, suitable for high-power laser applications.

Conical lenses are widely used in laser processing, beam shaping, scientific research, measurement, calibration, precision machining, calibration and medical fields, such as microscopes, optical tweezers and laser surgery of the eye.